Linn County, Missouri

Survey Area MO115• Missouri

The dominant drainage class is Somewhat poorly drained and the dominant hydrologic group is D (very slow infiltration, high runoff). The most common soil order is Alfisols — moderately leached forest soils with a clay-enriched subsoil. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Linn County, Missouri. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map Unit	Acres	Drainage	Hydro Group	Dwellings	Septic
Armstrong clay loam, 5 to 9 percent slopes, moderately eroded	100K	Somewhat poorly drained	D	Very limited	Very limited
Purdin loam, 9 to 14 percent slopes, eroded	41K	Moderately well drained	D	Somewhat limited	Very limited
Lagonda silt loam, 2 to 5 percent slopes, eroded	35K	Somewhat poorly drained	C/D	Very limited	Very limited
Armstrong loam, 2 to 5 percent slopes, eroded	34K	Somewhat poorly drained	D	Very limited	Very limited
Fatima silt loam, 0 to 2 percent slopes, frequently flooded	17K	Moderately well drained	C	Very limited	Very limited
Vesser silt loam, 0 to 2 percent slopes, occasionally flooded	14K	Poorly drained	C/D	Very limited	Very limited
Blackoar silt loam, 0 to 2 percent slopes, frequently flooded	13K	Poorly drained	B/D	Very limited	Very limited
Portage silty clay, 0 to 2 percent slopes, frequently flooded, frequently ponded	11K	Very poorly drained	D	Very limited	Very limited
Purdin clay loam, 14 to 20 percent slopes, eroded	10K	Moderately well drained	D	Very limited	Very limited
Kilwinning silt loam, 1 to 5 percent slopes	10K	Poorly drained	C/D	Very limited	Very limited
Grundy silt loam, 2 to 5 percent slopes	9K	Somewhat poorly drained	C/D	Very limited	Very limited
Chequest silty clay loam, 0 to 2 percent slopes, frequently flooded	9K	Poorly drained	C	Very limited	Very limited
Leonard silt loam, 1 to 6 percent slopes, eroded	9K	Poorly drained	C/D	Very limited	Very limited
Winnegan loam, 20 to 35 percent slopes	7K	Moderately well drained	D	Very limited	Very limited
Winnegan clay loam, 14 to 20 percent slopes, eroded	7K	Moderately well drained	D	Very limited	Very limited
Keswick clay loam, 5 to 9 percent slopes, eroded	7K	Moderately well drained	D	Very limited	Very limited
Purdin clay loam, 9 to 14 percent slopes, severely eroded	6K	Moderately well drained	D	Somewhat limited	Very limited
Blackoar silt loam, 1 to 4 percent slopes, frequently flooded	5K	Poorly drained	B/D	Very limited	Very limited
Zook silty clay loam, heavy till, 0 to 2 percent slopes, occasionally flooded	5K	Poorly drained	D	Very limited	Very limited
Colo silty clay loam, drainageway, 2 to 5 percent slopes, frequently flooded	4K	Poorly drained	C/D	Very limited	Very limited

Soil Orders in This Area

The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.

Alfisols

Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

Mollisols

Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.

Inceptisols

Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

What This Means

Building & Foundations

About 86% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.

Septic Systems

About 100% of soils are rated "very limited" for septic absorption fields. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

Gardening & Agriculture

Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.